/*
 * jQuery Cycle Lite Plugin
 * http://malsup.com/jquery/cycle/lite/
 * Copyright (c) 2008 M. Alsup
 * Version: 1.0 (06/08/2008)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Requires: jQuery v1.2.3 or later
 */
;(function($) {

var ver = 'Lite-1.0';

$.fn.cycle = function(options) {
	return this.each(function() {
			options = options || {};

			if (this.cycleTimeout) clearTimeout(this.cycleTimeout);
			this.cycleTimeout = 0;
			this.cyclePause = 0;

			var $cont = $(this);
			var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
			var els = $slides.get();
			if (els.length < 2) {
					if (window.console && window.console.log)
							window.console.log('terminating; too few slides: ' + els.length);
					return; // don't bother
			}

			// support metadata plugin (v1.0 and v2.0)
			var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});

			opts.before = opts.before ? [opts.before] : [];
			opts.after = opts.after ? [opts.after] : [];
			opts.after.unshift(function(){ opts.busy=0; });

			// allow shorthand overrides of width, height and timeout
			var cls = this.className;
			opts.width = parseInt((cls.match(/w:(\d+)/)||[])[1]) || opts.width;
			opts.height = parseInt((cls.match(/h:(\d+)/)||[])[1]) || opts.height;
			opts.timeout = parseInt((cls.match(/t:(\d+)/)||[])[1]) || opts.timeout;

			if ($cont.css('position') == 'static')
					$cont.css('position', 'relative');
			if (opts.width)
					$cont.width(opts.width);
			if (opts.height && opts.height != 'auto')
					$cont.height(opts.height);

			var first = 0;
			$slides.css({position: 'absolute', width:$cont.width(), height:$cont.height(), top:0, left:0}).hide().each(function(i) {
					$(this).css('z-index', els.length-i)
			});

			$(els[first]).css('opacity',1).show(); // opacity bit needed to handle reinit case
			if ($.browser.msie) els[first].style.removeAttribute('filter');

			if (opts.fit && opts.width)
					$slides.width(opts.width);
			if (opts.fit && opts.height && opts.height != 'auto')
					$slides.height(opts.height);
			if (opts.pause)
					$cont.hover(function(){this.cyclePause=1;}, function(){this.cyclePause=0;});

			$.fn.cycle.transitions.fade($cont, $slides, opts);

			$slides.each(function() {
					var $el = $(this);
					this.cycleH = (opts.fit && opts.height) ? opts.height : $el.height();
					this.cycleW = (opts.fit && opts.width) ? opts.width : $el.width();
			});

			$slides.not(':eq('+first+')').css({opacity:0});
			if (opts.cssFirst)
					$($slides[first]).css(opts.cssFirst);

			if (opts.timeout) {
					// ensure that timeout and speed settings are sane
					if (opts.speed.constructor == String)
							opts.speed = {slow: 600, fast: 200}[opts.speed] || 400;
					if (!opts.sync)
							opts.speed = opts.speed / 2;
					while((opts.timeout - opts.speed) < 250)
							opts.timeout += opts.speed;
			}
			opts.speedIn = opts.speed;
			opts.speedOut = opts.speed;

	opts.slideCount = els.length;
			opts.currSlide = first;
			opts.nextSlide = 1;

			// fire artificial events
			var e0 = $slides[first];
			if (opts.before.length)
					opts.before[0].apply(e0, [e0, e0, opts, true]);
			if (opts.after.length > 1)
					opts.after[1].apply(e0, [e0, e0, opts, true]);

			if (opts.click && !opts.next)
					opts.next = opts.click;
			if (opts.next)
					$(opts.next).bind('click', function(){return advance(els,opts,opts.rev?-1:1)});
			if (opts.prev)
					$(opts.prev).bind('click', function(){return advance(els,opts,opts.rev?1:-1)});

			if (opts.timeout)
					this.cycleTimeout = setTimeout(function() {
							go(els,opts,0,!opts.rev)
					}, opts.timeout + (opts.delay||0));
	});
};

function go(els, opts, manual, fwd) {
	if (opts.busy) return;
	var p = els[0].parentNode, curr = els[opts.currSlide], next = els[opts.nextSlide];
	if (p.cycleTimeout === 0 && !manual)
			return;

	if (manual || !p.cyclePause) {
			if (opts.before.length)
					$.each(opts.before, function(i,o) { o.apply(next, [curr, next, opts, fwd]); });
			var after = function() {
					if ($.browser.msie)
							this.style.removeAttribute('filter');
					$.each(opts.after, function(i,o) { o.apply(next, [curr, next, opts, fwd]); });
			};

			if (opts.nextSlide != opts.currSlide) {
					opts.busy = 1;
					$.fn.cycle.custom(curr, next, opts, after);
			}
			var roll = (opts.nextSlide + 1) == els.length;
			opts.nextSlide = roll ? 0 : opts.nextSlide+1;
			opts.currSlide = roll ? els.length-1 : opts.nextSlide-1;
	}
	if (opts.timeout)
			p.cycleTimeout = setTimeout(function() { go(els,opts,0,!opts.rev) }, opts.timeout);
};

// advance slide forward or back
function advance(els, opts, val) {
	var p = els[0].parentNode, timeout = p.cycleTimeout;
	if (timeout) {
			clearTimeout(timeout);
			p.cycleTimeout = 0;
	}
	opts.nextSlide = opts.currSlide + val;
	if (opts.nextSlide < 0) {
			opts.nextSlide = els.length - 1;
	}
	else if (opts.nextSlide >= els.length) {
			opts.nextSlide = 0;
	}
	go(els, opts, 1, val>=0);
	return false;
};

$.fn.cycle.custom = function(curr, next, opts, cb) {
	var $l = $(curr), $n = $(next);
	$n.css({opacity:0});
	var fn = function() {$n.animate({opacity:1}, opts.speedIn, opts.easeIn, cb)};
	$l.animate({opacity:0}, opts.speedOut, opts.easeOut, function() {
			$l.css({display:'none'});
			if (!opts.sync) fn();
	});
	if (opts.sync) fn();
};

$.fn.cycle.transitions = {
	fade: function($cont, $slides, opts) {
			$slides.not(':eq(0)').css('opacity',0);
			opts.before.push(function() { $(this).show() });
	}
};

$.fn.cycle.ver = function() { return ver; };

// @see: http://malsup.com/jquery/cycle/lite/
$.fn.cycle.defaults = {
	timeout:       4000,
	speed:         1000,
	next:          null,
	prev:          null,
	before:        null,
	after:         null,
	height:       'auto',
	sync:          1,
	fit:           0,
	pause:         0,
	delay:         0,
	slideExpr:     null
};

})(jQuery);